sharepoint 2013 Field Element (List)

Defines the internal data types used in the list infrastructure of a SharePoint Web site. A field is a column or attribute of information that a user can add to a list.

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Attributes

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Attribute	Description
Aggregation	Optional Text. Used in an aggregate field on an XML form to specify the function to apply to a collection of values or elements returned by an XPath expression. If you use the Node attribute to specify an XPath expression that returns a collection of values, you can also include an Aggregation attribute that specifies the action to take on the value set that is returned. This action can be either an aggregation function or an indication of the particular element within the collection. Possible values include the following: sum   Add the values. count   Count the number of values. average   Find the average of the values. min   Find the minimum value. max   Find the maximum value. merge   Merge the values. plaintext   Converts node text content into plain text. first   Apply property promotion and demotion to the first element in the collection. last   Apply property promotion and demotion to the last element in the collection. For more information about how the Node, PIAttribute, PITarget, PrimaryPIAttribute, and PrimaryPITarget attributes are used for property promotion and demotion in XML documents, see Using Content Types to Specify XML Document Properties.
AllowDeletion	Optional Boolean. TRUE if the field can be deleted.
AllowHyperlink	Optional Boolean. TRUE if hyperlinks can be used in the field.
AllowMultiVote	Optional Boolean. TRUE if multiple responses are allowed in a survey.
AppendOnly	Optional Boolean. When versioning is enabled in the list, TRUE if text can only be appended to existing text in the Note field.
AuthoringInfo	Optional Text. A descriptive string that is displayed in the field editing pages to identify the field and its purpose; for example, the LinkTitle field has the authoring info "(link to item)". This attribute is usually used if a field of the same name exists for another purpose.
BaseType	Optional. The BaseType attribute can be set to Integer, which stores values as integers, or to Text (default), which stores values as text. You cannot create integer base-type choice fields.
CalType	Optional Integer. Specifies the calendar type. Possible values include the following: 16   Saka Era 15   Chinese lunar 14   Korean and Japanese lunar 12   Gregorian transliterated French 11   Gregorian transliterated English 10   Gregorian Arabic 9   Gregorian Middle East French 8   Hebrew (lunar) 7   Thai 6   Hijri (Arabic lunar) 5   Korean Tangun Era 4   Taiwan Era 3   Japanese Emperor Era 1   Gregorian 0   No type specified
CanToggleHidden	Optional Boolean. TRUE if the field can be hidden through the user interface.
ClassInfo	Optional Text. Specifies a cascading style sheet (CSS) class to use for the field in the standard table view. If set, the specified class is used instead of the standard ms-vb2 class.
ColName	Optional Text. An internal attribute that defines the mapping of the field to the physical storage name for this field. This must be a valid name in the underlying database and must be identical to the name used in the database table. If not specified, the server generates a column name that does not collide with any existing column names and that contains only characters that are allowed by Microsoft SQL Server.
ColName2	Optional Text.
Commas	Optional Boolean. TRUE if commas are used to separate thousands.
Customization	Optional Text.
Decimals	Optional Integer. Determines the number of decimals to display. The value displayed is rounded up to the display precision; for example, 1.05 is displayed as 1.1 when rounded to one decimal place.
Description	Optional Text. Provides the description that is shown in the edit form for a list if a field description is specified. By default, fields in Microsoft SharePoint Foundation do not have descriptions.
Dir	Optional Text. Specifies the direction of text for a field that supports bidirectional reading order. The possible values are LTR (left-to-right), RTL (right-to-left), and none.
Direction	Optional Text.
DisplaceOnUpgrade	Optional Boolean. If a field definition already exists for the field, TRUE to force updates to field properties with the values that are specified in this field definition.
DisplayImage	Optional Text. Specifies the name of an icon that is displayed for the column.
DisplayName	Optional Text. The displayed name for a field. There is no restriction on text size or use of spaces. The display name can be edited by the user and can change after initial field creation. This name is used as a column heading when the field is displayed in a table view and as a form label when the field is displayed in a form. The tag returns the display name if given; otherwise, it defaults to the Name attribute.
DisplayNameSrcField	Optional Text. Generally used for a computed field that needs the same name as another field. If the source field is modified and the display name is changed by a user, then the display name of this field will also change. This string refers to the name of the other field.
DisplaySize	Optional Integer.
Div	Optional Number. A scale factor used in division before displaying a number. The display number is N * Mult / Div (rounded up to the number specified by Decimals).
EnableLookup	Optional Boolean. TRUE to enable lookup values in the field.
EnforceUniqueValues	Optional Boolean.
ExceptionImage	Optional Text. Used in a Recurrence field type to specify the name of the image file to use for exceptions.
FieldRef	Optional Text. Specifies the name of another field to which the field refers, such as a Lookup field.
FillInChoice	Optional Boolean. TRUE if the field allows users to fill in values for the column.
Filterable	Optional Boolean. TRUE if the field can be filtered.
FilterableNoRecurrence	Optional Boolean. TRUE if a filter can be created on the field in a view that does not expand recurring events. If Filterable contains TRUE, the field can be filtered in all views regardless of how FilterableNoRecurrence is set.
ForcedDisplay	Optional Text. Specifies text to display in place of the actual field value. This attribute is used in surveys to prevent the user name from being displayed.
ForcePromoteDemote	Optional Boolean.
Format	Optional Text. Specifies the formatting to use for numerical values. For date/time fields, the following values are possible: DateOnly   Display (and allow edits to) only the date portion (the time portion is set to 12:00 A.M. for all edited values). DateTime   Display and edit both date and time of day (default). ISO8601   Display date and time in ISO8601 time format converted to Coordinated Universal Time (UTC) format: YYYY-MM-DDTHH:MM:SSZ. This is the format used for document properties in 2007 Microsoft Office system as well as for the standard interchange format used in SharePoint Foundation between New and Edit forms and the server. ISO8601Basic   Use the abbreviated form of 8601 date/time formats: YYYYMMDDTHHMMSSZ. This is the format used for vCard/iCal. For Choice fields, this attribute can be set to Dropdown (default), which provides editing options through a drop-down selection, or to RadioButtons, which provides options through a group of radio buttons. For URL fields, this attribute can be set to Hyperlink (default), which displays the URL as a normal tag, or to Image, which displays the URL as .
FromBaseType	Optional Boolean. This attribute is deprecated in favor of the Sealed attribute.
Group	Optional Text. Specifies the column group to which the field belongs.
HeaderImage	Optional Text. Specifies the name of an image file to use as a header in the field.
Height	Optional Integer. Specifies the height in pixels of the images that are displayed for users in the User Information list.
Hidden	Optional Boolean. If TRUE, the field is completely hidden from the user interface. Setting ReadOnly to TRUE means the field is not displayed in New or Edit forms but can still be included in views.
HTMLEncode	Optional Boolean. TRUE to convert embedded characters so that they are displayed as text in the browser; characters that could be confused with HTML tags are converted to entities.
ID	Optional Text. Specifies the GUID of the field contained within braces ({}).
Id	Optional Text.
IMEMode	Optional Text. Specifies the Input Method Editor (IME) mode bias to use for the field. The IME allows for conversion of keystrokes between languages when one writing system has more characters than can be encoded for the given keyboard. Possible values include the following: auto   Not used. To specify this IME mode, set the IMEMode property value to an empty string (""). active   All characters are typed through the IME, but users can still deactivate the IME. inactive   Characters are typed without the IME, although users can still activate the IME.
Indexed	Optional Boolean. TRUE if the column is indexed for use in view filters.
IsolateStyles	Optional Boolean. For a Text field whose RichText attribute is TRUE and whose RichTextMode attribute is FullHtml, this attribute specifies that a server will rewrite the HTML of the field to ensure that it will not interfere with the rendering of the surrounding page.
IsRelationship	Optional Boolean. TRUE if the field is discoverable from the list to which it looks for its value.
JoinColName	Optional Text. This attribute is defined only for Lookup fields. It is very similar to ColName, except it denotes the name of the column that is used in the SQL JOIN between the local and external lists. Ordinarily, this value should not be customized. It is currently used only in the Field schema of certain built-in and base type fields to denote lookups into the URLs (DocMd) table, which is joined on the UrlID column.
JoinRowOrdinal	Optional Integer. Not intended to be used directly from your code.
JoinType	Optional Text. Specifies the type of JOIN used on the field. Possible values include INNER, LEFTOUTER, and RIGHTOUTER.
LCID	Optional Integer. The LCID attribute can be used to specify the country/region whose currency format is being used, for example, 1033 for the United States. Two special cases involve the euro symbol format. If LCID = -1 (0xFFFFFFF), the euro symbol is added as a prefix to the number. If LCID = -2 (0xFFFFFFE), the euro symbol is added as a suffix to the number. The number of decimal digits is 2, although this can be overridden by the Decimals attribute of the field. The euro currency symbol is equal to 0x20AC in UCS-2.
LinkToItem	Optional Boolean.
LinkToItemAllowed	Optional Text.
List	Optional Text. Specifies the internal name of a list.
ListItemMenu	Optional Boolean.
ListItemMenuAllowed	Optional Text.
Max	Optional Number. Specifies the maximum value allowed for the field.
MaxLength	Optional Integer. Specifies the maximum number of characters allowed in a field value. Edit forms are adjusted to enforce this value, which is validated on the client. If the user attempts to enter more than the number of characters set by MaxLength, an error message appears.
Min	Optional Number. Specifies the minimum value allowed for the field.
Mult	Optional Boolean. A scale factor used in multiplication before displaying a number.
Name	Required Text. The name of a field. This is the internal name of a field and is guaranteed never to change for the lifetime of the field definition. It must be unique with respect to the set of fields in a list. The name is autogenerated based on the user-defined name for a field.
NegativeFormat	Optional Text. Specifies how to indicate negative values. Can be set to one of the following values: MinusSign   Use minus sign as prefix. Parens   Surround with parentheses.
Node	Optional Text. Used in XML forms, this attribute is required for all fields except processing instruction (PI) links, and it specifies the XPath expression for a node that is promoted.
NoEditFormBreak	Optional Boolean. TRUE to prevent a line break from being added between fields in the new item form or edit item form. Some field types, such as a rich-text field, provide spacing by default, and this attribute allows control over the extra spacing that results.
NumLines	Optional Integer. Recommends the number of lines (rows) to display in a TEXTAREA block during editing. This is merely a client UI hint—there is no enforced limitation on the number of lines of text that can be edited.
Percentage	Optional Boolean. TRUE if the value is displayed as a percentage; that is, a number multiplied by 100 with a percent sign (%) appended.
PIAttribute	Optional Text. Specifies the attribute in the document processing instruction (specified by the PITarget attribute) to use as the column value. Used for property promotion and demotion in XML documents. If you specify the PIAttribute attribute, you must also specify the PITarget attribute. For more information about how the Node, PIAttribute, PITarget, Primary PIAttribute, and PrimaryPITarget attributes are used for property promotion and demotion in XML documents, see Using Content Types to Specify XML Document Properties.
PITarget	Optional Text. Specifies the document processing instruction in which the column value is stored in documents of this content type. Used for property promotion and demotion in XML documents. If you specify the PIAttribute attribute, you must also specify the PITarget attribute. For more information about how the Node, PIAttribute, PITarget, Primary PIAttribute, and PrimaryPITarget attributes are used for property promotion and demotion in XML documents, see Using Content Types to Specify XML Document Properties.
PrependId	Optional Boolean. Used in Issue Tracking lists, TRUE to display the collection IDs of related issue items in Edit and New item forms.
Presence	Optional Boolean. TRUE if user information is present for the field.
PrimaryKey	Optional Boolean. TRUE if the field is the primary key in the relationship between the list and another list.
PrimaryPIAttribute	Optional Text. Used for property promotion and demotion in XML documents. Specifies an alternate attribute in the document processing instruction, specified by the PrimaryPITarget, to use as the column value. If you specify the PrimaryPIAttribute attribute, you must also specify the PrimaryPITarget attribute. If specified, SharePoint Foundation uses these values before those specified in the PITarget and PIAttribute attributes. For more information about how the Node, PIAttribute, PITarget, Primary PIAttribute, and PrimaryPITarget attributes are used for property promotion and demotion in XML documents, see Using Content Types to Specify XML Document Properties.
PrimaryPITarget	Optional Text. Specifies an alternative document processing instruction in which the column value is stored for documents of this content type. If you specify the PrimaryPIAttribute attribute, you must also specify the PrimaryPITarget attribute. If specified, SharePoint Foundation uses these values before those specified in the PITarget and PIAttribute attributes. For more information about how the Node, PIAttribute, PITarget, Primary PIAttribute, and PrimaryPITarget attributes are used for property promotion and demotion in XML documents, see Using Content Types to Specify XML Document Properties.
ReadOnly	Optional Boolean. If TRUE, the field is not displayed in New or Edit forms but can be included in views. In addition, setting ReadOnly to TRUE hides the field from Site Settings pages for managing site columns and content types. Setting the Hidden attribute to TRUE completely hides the field from the UI. If you do not include this attribute, SharePoint Foundation treats the column as if this attribute is set to False.
ReadOnlyEnforced	Optional Boolean. TRUE to specify that the user cannot change the field by any means and that it can only be changed by the system.
RelationshipDeleteBehavior	Optional Text.  Specifies the delete behavior of the field. Possible values include Cascade, Restrict and None.
RenderXMLUsingPattern	Optional Boolean. Used for computed fields to determine the display format. If TRUE, values are rendered based on the display pattern of the computed field, rather than on the column value of the first noncomputed field reference upon which the computed field is based. For example, in a picture library, the Picture Size column is represented by width x height, but if this attribute is not set to TRUE, only the first field reference, width, is displayed. If it is set to TRUE, the format of width x height is displayed.
Required	Optional Boolean. If TRUE, the field must not have an empty value assigned to it. If a nonempty field value is not given in a form post, either the standard required-field text or an explicitly specified message (that is, via tags) is displayed in the error form. This validation is handled only by the client (the database always allows NULL for all user-defined fields).
RestrictedMode	Optional Boolean. TRUE to not allow the Note field to contain enhanced rich text formatting, such as pictures, tables, or hyperlinks, nor to allow pasting formatted text into the field.
ResultType	Optional Text. Specifies the data type of values that are returned from the field.
RichText	Optional Boolean. TRUE if the field displays rich text formatting.
RowOrdinal	Optional Integer. Specifies the database location for the field.
Sealed	Optional Boolean. Setting this attribute to TRUE for a field in the Schema.xml file for a list marks the field as irremovable in the Change Column page.
SeparateLine	Optional Boolean. Used internally to support rendering a field (for example, Notes or Comment) in a separate line. This attribute is not intended for public use.
SetAs	Not intended to be used directly from your code.
ShowAddressBookButton	Not intended to be used directly from your code.
ShowAlways	Optional Boolean.
ShowField	Optional. The ShowField attribute can be set to the field name to be displayed. By default, a hyperlinked text from the Title field of the record in the external list is displayed. But the ShowField attribute can be used to override that and display another field from the external list. The following data types are allowed as targets of a ShowField attribute: Text, Choice, and Counter. For a Lookup field, this parameter must be set to the internal field name; setting it to the display name does not raise an error, but breaks the field.
ShowInDisplayForm	Optional Boolean. TRUE to display the field in the form for viewing the item.
ShowInEditForm	Optional Boolean. TRUE to display the field in the form for editing the item.
ShowInFileDlg	Optional Boolean. This attribute is valid only for fields within document library schemas. If FALSE, the field does not show up in the property dialog box for saving forms that appears when saving from client applications. For example, the Title field has this attribute because this is set directly in the document being saved to the document library.
ShowInListSettings	Optional Boolean. TRUE to display the column on the page for customizing list settings.
ShowInNewForm	Optional Boolean. If FALSE, the field does not show up in a Fields enumeration when the display mode is set to New. Fields with this setting do not show up in the default New Item page for a given list. In particular, this is used to hide fields on the page for uploading documents to the document library.
ShowInVersionHistory	Optional Boolean. TRUE to display the column on the page for viewing list item versions.
ShowInViewForms	Optional Boolean. TRUE to specify that the field is displayed in pages that are used to view list data.
Sortable	Optional Boolean. TRUE if values in the field can be sorted.
SourceID	Optional Text. Contains the namespace that defines the field, such as http://schemas.microsoft.com/sharepoint/v3, or the GUID of the list in which the custom field was created.
StaticName	Optional Text. Contains the internal name of the field.
StorageTZ	Specifies how date/time values are stored. When StorageTZ is set to UTC, the date/time is handled as Coordinated Universal Time (UTC). To denote that a date/time value refers to "abstract" time, meaning that the date/time is stored in the database as entered by the user without conversion or storage of the local time zone, omit the StorageTZ attribute.
StripWS	Optional Boolean. TRUE if white space is removed from the beginning and end of field values.
SuppressNameDisplay	Optional Boolean. TRUE to not display the name of the user in a User field.
TextOnly	Optional Boolean. If TRUE, the field can contain only Text values.
Title	Optional Text. Contains the title of the field that is displayed in the user interface.
Type	Required Text. The data type of the field (unless the Field element is a child of ProjectedFields). Note In the Technology Preview release of Microsoft SharePoint Foundation 2010, the Type attribute has a different meaning and only one possible value (“Lookup”) when it is a child of ProjectedFields. See ProjectedFields Element (View) for more information about this use of Type. SharePoint Foundation includes the following data types by default: AllDayEvent   Specifies an all day event. Corresponds to the bit SQL data type. Attachments   Stores the URLs for attachments. Corresponds to the bit SQL data type. Boolean   Used to store a TRUE/FALSE value (stored in the database as 0 or 1). This field is sortable and groupable. Corresponds to the bit SQL data type and represented by the SPFieldBoolean class. Calculated   Specifies a field whose value is calculated based on other columns. Corresponds to the sql_variant SQL data type and represented by the SPFieldCalculated class. Choice   Allows the user to specify a predetermined set of values that can be used to enter data into the field. The Choice and Lookup types are the most important fields for sorting and grouping. The BaseType and Format attributes can be used for choice fields. This field is sortable and groupable. When a value is given for a choice option, then that value is used as the submitted value for the field selection. When no value is given, that choice is submitted as the text value of the choice. In all cases, the text value of the choice is what is displayed in the UI (drop-down list or radio button text). The order in which choices appear in the editing UI is always the order that items are specified within the CHOICES element. Use the MultiChoice type to specify a Choice field that implements check boxes and allows the user to select multiple values. Corresponds to the nvarchar SQL data type and represented the SPFieldChoice class. Computed   Specifies a field that depends on another field for its contents. For example, a LinkTitleNoMenu field amounts to surrounding a Title field value with a hyperlink. Represented by the SPFieldComputed class. ContentTypeId   Contains a content type ID. For information about the format of content type IDs, see Content Type IDs. Corresponds to the varbinary SQL data type. Counter   Generally used only for the internal ID field. Its integer value is set automatically to be unique with respect to every other item in the current list. The Counter type is always read-only and cannot be set through a form post. This field is sortable but not groupable. Corresponds to the int SQL data type. CrossProjectLink   Used to connect an event in a SharePoint list with a Meeting Workspace site; refers specifically to the field type of the checkbox used in New and Edit Item forms to create a Meeting Workspace site for the item. Corresponds to the bit SQL data type and represented by the SPFieldCrossProjectLink class. Currency   Allows for a currency value to be entered. Each currency field is tied to a specific locale’s currency. In all other respects, it is treated like the Number field type. Use the LCID attribute to indicate a currency of a specific locale. The Decimals, Max, and Min attributes can be used for currency types. This field is sortable and groupable. Corresponds to the float SQL data type and represented by the SPFieldCurrency class. DateTime   Allows for storage of a fully qualified date or time of day. Use the Format attribute to specify date formatting, and use the StorageTZ attribute to determine how date/time values are stored. This field is sortable and groupable. For Display mode, the order of date formatting derives from the regional settings ("M/D/Y" or "D/M/Y"). In Edit mode (or in New mode for Default element value), date/times are rendered in universal format: M/D/Y hh:mm am/pm. Corresponds to the datetime SQL data type and represented the SPFieldDateTime class. File   Contains a file. Corresponds to the uniqueidentifier SQL data type. GridChoice   Contains a rating scale for surveys. Corresponds to the ntext SQL data type and represented by the SPFieldRatingScale class. Guid   Allows for globally unique identifiers (GUIDs). Corresponds to the uniqueidentifier SQL data type. Integer   Allows for positive or negative integer values. The Commas and NegativeFormat attributes are used to specify integer formatting. Corresponds to the int SQL data type. Lookup   Behaves very similarly to a Choice field, except that the available options come from another list rather than being a hard-coded selection of values. The List and ShowField attributes can be used for Lookup fields. This field is sortable and groupable. For sorting and grouping, use the DisplayField value (Title, by default) rather than the foreign key stored in the list. Corresponds to the int SQL data type and represented by the SPFieldLookup class. LookupMulti   A Lookup field that can contain more than one value. Parent type: Lookup. ModStat   Contains content approval status. Possible values include Approved (default), Rejected, and Pending (stored in the database as 0, 1, or 2, respectively). Corresponds to the int SQL data type. MultiChoice   Specifies a Choice field that implements check boxes and allows the user to select multiple values. Corresponds to the ntext SQL data type and represented by the SPFieldMultiChoice class. MultiColumn   A Note field that emulates a field containing multiple values. For an example of a multicolumn field type, see Custom Field Type Definition. For information on multicolumn fields, see Custom Multicolumn Field Classes. Parent type: Note. Note   Allows users to enter multiple lines of text. This field is not sortable or groupable. All text is defined to be straight ASCII characters without HTML markup. Anything that looks like HTML markup or a URL is simply quoted (for example, Server.HTMLEncode) to look like straight text. The control for editing this format is a simple TEXTAREA block. Use the NumLines attribute to specify the number of lines to display. Corresponds to the ntext SQL data type and represented by the SPFieldMultiLineText class. Number   Allows for a floating point number to be entered. This field is sortable and groupable. Numbers entered are parsed according to the current locale settings for decimal points and thousand separators. Negative numbers can be indicated by wrapping them in parentheses or by using a negative symbol. The following attributes can be used in conjunction with the Number attribute to specify number formatting: Decimals, Div, Max, Min, Mult, and Percentage. Corresponds to the float SQL data type and represented by the SPFieldNumber class. PageSeparator   Inserts a page break in a survey list. Represented by the SPFieldPageSeparator class. Recurrence   Used to edit and define the recurrence pattern for an item in an events list. Corresponds to the bit SQL data type. Text   A single line of text entered in an edit box. This field is sortable and groupable. Use the MaxLength attribute to set a maximum number of characters allowed. Corresponds to the nvarchar SQL data type and represented by the SPFieldText class. ThreadIndex   Contains the ID that indicates the relative position of a message within a conversation thread. Corresponds to the varbinary SQL data type. Threading   The Threading field type is used in the creation and display of threaded discussion-like views. Any list can contain a threading column, but a special UI is generated when it is used. (It is never displayed as a standard editable field in a form nor as a normal column in a view.) If a sort is performed on a threading field, a pre-order traversal of all the records in a parent-child relationship is returned. This is accomplished by saving the concatenation of the creation date and ID number of all the parent records of a particular record. Corresponds to the varchar SQL data type. URL   Used to create a freeform hyperlink. A URL field is displayed as Description. If no description is given, it is displayed as URL">URL. The URL text is itself stored in the URLs (DocMd) table, which stores all the URLs in SharePoint databases on the server. This is done so that any URLs that are local on the server can be updated through link fixup when their destination moves. When a record with a URL field contained within it is deleted, the corresponding referenced record from the URL table is also deleted. This field is sortable and groupable. (The sort is defined according to the textual description rather than the contents of the URL; if no description is given, it sorts the same as blank.) When Type is URL, the LinkType attribute can be used to specify the type of link. Corresponds to the nvarchar SQL data type and represented by the SPFieldUrl class. User   A Lookup field that references the UserInfo database table. Corresponds to the int SQL data type and represented by the SPFieldUser class. UserMulti   A User field that can contain more than one value. Parent type: LookupMulti. WorkflowEventType   Specifies a workflow event type as represented by the SPWorkflowHistoryEventType enumeration. Parent type: Integer. WorkflowStatus   Specifies workflow status as represented by the SPWorkflowStatus enumeration. Corresponds to the nvarchar SQL data type.
UniqueId	Optional Text. Not intended to be used directly from your code.
UnlimitedLengthInDocumentLibrary	Optional Boolean. TRUE to allow unlimited field length in document libraries.
URLEncode	Optional Boolean. TRUE to convert special characters, such as spaces, to quoted UTF-8 format, for example, %c3%ab for character ë.
URLEncodeAsURL	Optional Boolean. Like URLEncode, but TRUE to specify that the string to encode is a path component of a URL so that forward slashes ("/") are not encoded.
UserSelectionMode	Optional Text. Specifies whether only the names of individual users can be selected in a user field on an item form, or whether the names of both individuals and groups can be selected. The following values are possible: 0 - Only the names of individuals can be selected. 1 - The names of both individuals and groups can be selected.
UserSelectionScope	Optional Integer. Specifies a scope for selecting user names in a user field on an item form. If the value is 0, there is no restriction to a SharePoint group. If the value is greater than 0, user selection is restricted to members of the SharePoint group whose ID equals the value that is specified.
Version	Optional Text.
Viewable	Optional Boolean. TRUE to specify that the field is added to the default view. The default value is TRUE.
WebId	Optional Text.
Width	Optional Integer. Specifies the width in pixels of the images that are displayed for users in the User Information list.
WikiLinking	Optional Boolean. TRUE to specify that wiki links, which appear in the form of double brackets ([[…]]), become translated into HTML links, which use the tag.
XName	Optional Text. Used internally in XML forms to identify fields that have been added, deleted, or modified. This attribute is not intended for public use.

Child Elements

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CHOICES, Customization, Default, DefaultFormula, DisplayBidiPattern, DisplayPattern, FieldRefs, Formula, FormulaDisplayNames, MAPPINGS, Validation

Parent Elements

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Fields, ProjectedFields

Occurrences

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Minimum: 0 Maximum: Unbounded when the parent is Fields. When the parent is ProjectedFields the maximum is difference between the maximum number of allowed fields in the primary list that is being queried and the number of fields already in the list.

Remarks

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To create a custom field definition for a list definition that is based on a default SharePoint Foundation field type, use the Field (List - Definition) element within a Schema.xml file. To create a custom field definition as a pluggable Feature that is based on a default field type and that can be reused across Web sites and lists within a site collection, use the Field (Field) element to define a custom site column. To create a custom field type that implements a custom class for special data validation and field rendering, use the Field (Field Types) element.

Fields can be referenced from View definitions as well as from expressions in computed field rendering elements. Use the Field (View) element to return a formatted field value for display within a view, and use the Column (View) element to return the raw data value of the field. The syntax for referencing a field is as follows:

XML

Copy

By default, the field is rendered with the default attributes for that field definition as specified in the previous table. Any of the field attributes can be overridden in the CAML markup of the FieldRef attribute, which overrides the definition given for the field itself. (The Type attribute for a field cannot be changed.)

can be used to display the user-defined display name of a field.

Within a Fields element enumeration, the Name attribute can be omitted. For some field references, the raw data stored for the field can be accessed by using .

Some properties of fields from forms and from certain aspects of the authoring UI can be rendered through the Property element, for example, or . These elements simply retrieve the value of any field attribute or child element (Property) by name.

In addition to the preceding types, the following predefined fields are used with the Field element.

Name	Description
Created	A field that contains a DateTime value specifying the time that the item was created (in UTC).
CreatedBy	A field that contains a Lookup value that refers to the UserInfo table and indicates the user who created the item.
Edit	A Computed field (with no additional schema) that contains a hyperlink to the form for editing an item. This field references the page for editing the item and the ID field to identify it.
ID	A Counter field type that is associated with every item in every list. The ID uniquely identifies the list item in URLs and in POST forms when editing. Specifying New as the value of the ID attribute in the Cmd=Save command creates an item rather than edits a current item.
Modified	A field that contains a DateTime value specifying the time that the item was last modified (in UTC). The Modified time is used as a sort of Version field as well. The last modification date of an item is always posted when an existing item is being edited. If it does not match the current modification date, the server fails the edit and returns an error to the user, providing a link to the current data on the server (which opens in a new window), so that posted values can be copied from the old form into the new one.
ModifiedBy	A field that contains a Lookup value to the UserInfo table indicating the user who last modified the item.
Title	The generic display name of every item. It may have a different display name in different lists but the same internal field name of Title. The title is the default text to display for Lookup fields to lists.
LinkTitle	A computed field that displays hyperlinks to items, containing the title texts and generating URLs (and new icon references) to the items. There is no additional storage for this field; it relies on the ID and Title fields for rendering of its UI.

Note

The fields returned in a Fields enumeration are affected by the display mode. Fields that are marked with the Hidden attribute are never returned. Fields that are marked with the ReadOnly attribute are not returned if a form is being rendered (if Fields is called from within a ListForm element). Fields that are marked with the ShowInNewForm attribute are not returned in the NEW or PREVIEWNEW display modes. Fields marked with the ShowInFileDlg attribute are not returned when rendering the NewForm dialog form.

Example

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The following example uses the Field element to specify options for a list named Area list.

XML

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